What is the effect of vigorous exercise on the brain?

Abstract Aims: This study aimed to verify whether vigorous exercise is capable of generating mental fatigue. Methods: To do so, 16 young adult male (29.4 ± 5.2 years old) cyclists (5.4 ± 4.6 years of training) underwent three visits: 1) control session (rest); 2) session with cognitive demand (20 minutes of AX-CPT); 3) session with vigorous exercise (10km time trial). Mental fatigue was assessed using the visual analog scale of fatigue in the pre-and post-session moments. A two-way ANOVA of repeated measures followed by the Bonferroni posthoc was used to verify the effect of the condition (control, cognitive demand, and exercise) and time (pre and post) interaction. The paired "t" test was used to compare the delta of mental fatigue (post - pre) of the sessions. The partial eta squared was used to determine the effect size of the variance. The significance adopted was p < 0.05. Results: A condition x time interaction was observed (F (2.30) = 5.349, p = 0.010, partial η2 = 0.263). When comparing the deltas, a mean difference was found between the control and vigorous exercise (p = 0.033) conditions and cognitive demand and vigorous exercise (p = 0.017) conditions. Control and cognitive demand sessions showed no difference (p = 0.801). Conclusion: The findings suggest that intense physical exercise seems to cause mental fatigue after practice.

Burnout syndrome in health-care professionals in a university hospital

OBJECTIVE: To evaluate professional achievement and factors associated with occupational burnout among health professionals. METHODS: An institution-based cross-sectional study was conducted on 436 healthcare providers, consisting of 101 nurses, 81 doctors and 254 nursing technicians, all meeting pre-established inclusion criteria. Occupational burnout was detected using the Maslach occupational burnout inventory tool. Data were collected by self-administered questionnaires comprising questions concerning socio-demographics, education and training, and the Maslach occupational burnout inventory was used to identify levels of emotional exhaustion, depersonalization and professional achievement. RESULTS: Emotional exhaustion was associated with education level and work place for nursing technicians. Depersonalization was associated with gender in nursing technicians. For nurses, depersonalization showed a significant association with education level, whereas this factor was associated with number of jobs for doctors. Lower levels of professional achievement were observed for unspecialized doctors compared to those with further training. Higher levels of professional achievement were associated with professionals with postgraduate training compared to those without. CONCLUSIONS: High levels of emotional exhaustion were found in professionals from the maternity unit as well as in professionals with lower educational levels. Depersonalization was higher in physicians with several jobs and in female nurses. Low professional achievement was found in unspecialized doctors, while high professional achievement was associated with postgraduate training.

Psicopatologia del trabajo / Work psychopathology

Se delimita el concepto de psicopatología del trabajo restringiéndolo a los variados trastornos y conflictos que tienen su causa cierta en la mecánica intrínseca de la actividad laboral. Se excluyen las causas que provienen del ambiente físico y de las condiciones de vida. Se identifica el síndrome neurasteniforme de fatiga nerviosa como producto del desacople entre los tiempos neurofisiológicos del sistema nervioso central y los ritmos de trabajo. Se señala el error de tomar como parámetro el rendimiento para medir la fatiga nerviosa, que ha substituido en el trabajo industrial a la antigua fatiga muscular. Se señala la necesidade de desarrollo de la Ergonomía, ciencia interdisciplinaria aque estudia la concordancia de las posibilidades y propiedades físicas y psicológicas del hombre con la de los sistemas técnicos laborales contemporáneos y las condiciones de su funcionamiento